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Earn +20 ptsQ: What is the sum of 2r and 2s?
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R plus s equals 4 2r plus 3s equals 8?
r + s = 4 and 2r + 3s = 8 multiply the first equation by 2 giving 2r + 2s = 8 subtract this from the second equation giving s = 0 So r = 4 and s = 0.
Can you find a pattern to connect the row with it's sum Row- 0 1 2 3 4 5 6 Sum- 1 2 4 8 16 32 64?
The sum = 2r : where r is the row number.
What is 12-2R?
12-2r = 10
How do you solve 2r-1 equals 9?
2r-1=9 2r =10 r =5
What do you times to -2r to get -13?
11
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